movies = ["life is beautiful", 
		  "source code", 
		  "agust rush",
		  ["matrx 1", "matrix 2", "matrix3"],
		  ["hp 1", "hp 2", "hp 3"]]

""" add optional argument """

def print_list (the_list, level = 0):
	for each_item in the_list:
		if isinstance(each_item, list):
			print_list(each_item, level + 1)
		else:
			for tab_stop in range(level):
				print("\t", end='')
			print(level, ":", each_item)

print_list(movies)

